package cn.kongwg.demo01;

/**
 * @author kongwg
 * @create 2021-05-23 21:16
 */

public class SeDemo1 {
    public static void main(String[] args) {
        Number number = 1;
        System.out.println("number = " + number.getClass());
        final int x = 1;
// x = 2;  // cannot assign value to final variable 'x'
        final A y = new A();
        y.a = 1;
    }
}

class A {
    int a = 2;
}
